Service manual
36
11.4.3 Auto fan at cooling mode:
Condition
T=Indoor Temp.-Setting Temp.
Indoor fan speed
T<1.5℃ Low
1.5℃<T<4℃ Mid.
Room temp. up
T>4℃ High
T> 3℃ High
1℃<T<3℃ Mid.
Room temp. down
T<1℃ Low
11.4.4 Anti-freezing control to indoor evaporator at cooling mode( T: evaporator temp. )
Evaporator Temp. Compressor
0℃<T< 4℃ Decrease frequency of compressor
T< 0℃ Off
11.4.5 Current protection
Model Current Compressor
I>18 A Off
14.5A<I<18A Decrease frequency of
compressor
Current up MSH-18HRIN1
I< 12.0A On
I>17.5 A Off
14.0A<I<17.5A Decrease frequency of
compressor
Current down MSH-18HRIN1
I< 11.5A On
11.4.6 Rated capacity test
Set mode to cooling mode
Set temp. to 17°C
Set fan speed to high speed
Push turbo button 5 times in 10 seconds.
Using special remoter controller
After 5 hours, cancel rated capacity test
Turbo function
Increasing frequency of compressor
After operating 30 minutes, return automatically to the mode and temp. previously selected.
11.5. Dehumidifying mode
11.5.1 The 4-way valve is off
11.5.2 the indoor fan is fixed in breeze speed
11.5.3 Compressor run in low frequency
11.5.4 Low room temperature protection:
11.5.5 When room temperature decreases to below 10℃, compressor and outdoor fan will stop
(indoor fan is Breeze). Dehumidifying operation will be resumed when room temperature restores to
over 12℃.
11.5.6 At dehumidifying mode, the anti-freezing function of the indoor heat exchanger is the same as
that of cooling mode.
11.6. Heating mode
11.6.1. Generally, the 4-way valve is open at heating mode, but it is closed at defrosting. 4-way valve
must delay 2 minutes compared with compressor if the compressor changed into non-heating mode
or turned off. 4-way valve doesn't delay in dehumidifying mode.
11.6.2. Generally, the outdoor fan is turned off with the on-off action of compressor in heating mode,
except for the defrosting mode or the end of defrost.
11.6.3. Action of compressor and outdoor fan motor at heating mode: compressor must run for 7
minutes after starting and then judge temperature. Meanwhile other protections are still valid.
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